best app/software for mac to read/write NTFS

I may end up getting another external hard drive & would like to be able to stay with NTFS so I can use it with either PCs or macs, there is a PC in my home & I would like to be able to use it between the PC & my macbook pro.

does anybody know of good reliable software that does not hog resources that will enable me to read & write NTFS on my macbook pro?

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